Navigable vessel.



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PATENTED MAY 10, 1904.

G. A. M BR. NAVIGABL SSEL. AAAAAAAA ION FILED NOV. 21. 1902.

UNITED STATES Patented May 10, 1904.

PATENT OFFICE.

CAREY ALAN MANKER, OF PEARL, ILLINOIS, ASSIGNOR TO MANKER- HEAVNER NAVIGATION COMPANY, OF ST. LOUIS, MISSOURI, A COR- PORATION OF ARIZONA TERRITORY.

NAVIGABLE VESSEL.

SPECIFICATION forming part of Letters Patent No. 759,536, dated May 10, 1904.

Application filed November 21, 1902. Serial No. 132,199. (No model.)

To all whom it may concern:

Be it known that I, CAREY ALAN MANKER, a citizen of the United States, residing at Pearl, in the county of Pike and State of Illinois, have invented certain new and useful Improvements in Navigable Vessels, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

The invention relates to navigable or marine vessels; and ithas for its object to provide an improved keel for vessels of this kind.

The invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a side elevation of my vessel with parts broken out and shown in vertical section. Fig. II is a bottom view of a Vessel with parts in horizontal section. Fig. III is a longitudinal vertical section taken through the propeller-cavities of the keel of the vessel.

1 designates the hull of the vessel, which may be of any contour deemed desirable.

2 is a keel or runner carried by the hull 1 and arranged to be adjusted vertically in said hull for the purpose of elevating or lowering the propellers and working parts that are carried by the keel to suit them to the condition of the water through which the vessel moves. The forward end of this keel may be vertical, as seen in Fig. I, or it may be tapered, as seen in Fig. III.

A designates propellers, preferably located at the rear of the widest cross-section of the keel 2, as seen in Figs. I and II. In the keel 2 at the locations of these propellers is a chamber 9, in which the propellers partially operate, while the remainder of their operation is effected exterior of the keel, as most clearly illustrated in Fig. II. The two propellers A are designed to be rotated in opposite directions, so that the descending strokes of each propeller will occur outside of the keel and the ascending strokes will occur in the chamber 9. By this arrangement the propellers are caused in their downward strokes to impinge against the water in which they move outside of the keel, and therefore act to lift or buoy the vessel, and the blades being inclosed by the keel on their upward strokes are shielded thereby from the water outside of the keel, and therefore the resistance against the upward strokes of the propeller-blades is materially lessened, and owing to the decrease of resistance thereby oifered the blades in their descending strokes act much more effectually to lift or buoy the vessel.

10 is a block set into the lower side of the keel 2 and on which the propellers A are mounted. This block is secured to the keel by screws 11, and it is recessed to provide a part of the chamber 9, the remainder of which is contained by the body of the keel above it.

B is a duct leading rearwardly and down wardly from the chamber 9, through which the water that enters said chamber from its sides is discharged in the action of the propellers as rapidly as it finds egress.

12 is a gate (see Fig. III) designed to be lowered to close the duct B when the vessel is backed, thereby preventing the flow of water therethrough at such time to the detriment of the action of the propellers. The gate 12 is provided with a lift-rod 13, by which it may be moved, the rod being intended to be upheld by any suitable means when the gate is open.

I claim as my invention 1. The combination with a vessel-keel, of a screw-propeller having its blades on the upward stroke shielded by a part of said vessel keel and 011 the remainder of the stroke unshielded, substantially as and for the purpose set forth.

2. The combination with a vessel-keel, of a screw-propeller and a shielding member carried by said keel and located in frontof the ascending blades whereby the asending blades are wholly or partially protected from impinging in the water as the vessel moves forward, the descending blades being free to operate within the water to propel and lift the vessel.

3. In a vessel, the combination of a chambered keel, and one or more propellers arranged to operate partially in the chamber of said keel and partially exterior of said keel, substantially as and for the purpose set forth.

4:. In a vessel, the combination of a chambered keel, a pair of propellers arranged to operate partially in the chamber of said keel, and partially exterior of the keel, and means for imparting rotation to said propellers in directions opposite to each other, substantially as set forth.

5. In a vessel, the combination of a hull, a keel provided with a chamber and a duct leading rearwardly from said chamber, propellers mounted in said chamber and arranged to rotate partially in said chamber and partially exterior of said keel, and means for operating said propellers, substantially as set forth.

6. In a vessel, the combination of a hull, a keel provided With a chamber and a duct leading rearwardly from said chamber, propellers mounted in said chamber and arranged to rotate partially in said chamber and partially exterior of said keel, means for operating said propellers, and a gate mounted in said keel and adapted to control said duct, substantially as set forth.

In testimony whereof I have hereunto set my hand this 15th day of November, 1902.

CAREY ALAN MANKER.

In presence of B. HEAVNER, W. F. Hnss. 

